Malicious PDF — malware analysis report

Static analysis result for SHA-256 afdd32cc0b54933a…

MALICIOUS

PDF

76.9 KB Created: 2021-05-06 02:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 68c77b59a42ebaf0b7a6cda93b0694fa SHA-1: 29bb98198f886b1373806e19dc5300e6befeae6f SHA-256: afdd32cc0b54933ab283f8a5fa6e61314650f9b68689fb830f07371b47e5fee5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or SEO manipulation scheme, likely involving JavaScript for redirection or obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/strik?utm_term=how+to+work+a+gevalia+coffee+maker PDF link annotation
    • https://kasapumaf.weebly.com/uploads/1/3/1/3/131397987/7197475.pdfIn PDF document text
    • https://divisekul.weebly.com/uploads/1/3/5/3/135347680/pofiresel_nalalag_sikategotevik_komunelape.pdfIn PDF document text
    • https://cdn.sqhk.co/kikutajaz/hbgjsug/62829467145.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/1812884.pdfIn PDF document text
    • https://cdn.sqhk.co/xalibolopov/hhgjTig/2370634873.pdfIn PDF document text
    • https://xixezowipena.weebly.com/uploads/1/3/5/3/135341666/vowesixasip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496853/normal_602072c688736.pdfIn PDF document text
    • http://piguzipudoval.iblogger.org/hello_neighbor_hide_and_seek_android_beta.pdfIn PDF document text
    • https://cdn.sqhk.co/jagawubu/ehihcgy/69949568851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_6042d541b8562.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500425/normal_5fc57313b62f8.pdfIn PDF document text
    • https://cdn.sqhk.co/menigopas/yziahfy/85043352166.pdfIn PDF document text
    • https://cdn.sqhk.co/lenubire/hkjjBHJ/bgn_launcher_mod_apk.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/koreleb-nufupuj-jeritowatunifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_60132a84e5355.pdfIn PDF document text
    • https://xomowozijirogap.weebly.com/uploads/1/3/4/6/134667332/wusitarevu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445337/normal_5ff4ec83dd062.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/ge5fhiR/stay_z__2.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/djjbv8J/pajinumewizuna.pdfIn PDF document text
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/boropivovomape.pdfIn PDF document text
    • https://tenigirexono.weebly.com/uploads/1/3/4/6/134645883/rozopikikazit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakilapawunafep.epizy.com/wudoxakilutozatisavarate.pdfIn PDF document text
    • http://tawegoju.rf.gd/boards_and_beyond_dermatology.pdfIn PDF document text
    • http://xegiseko.epizy.com/free_freecell_solitaire_mac.pdfIn PDF document text
    • http://kiwizenodemi.epizy.com/what_is_the_importance_of_mass_media_in_the_society.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF4 5200 bytes
SHA-256: a1c02ba0e46ccb075d035c99d0037eb4b294fcafb8ebb3b6471e95c61c501e04
font_01_sfnt_off0000ffb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB2 11808 bytes
SHA-256: b8acd80435ae80c855de045bde7f6c0d43eb694559f7915f9896166efb2882cd